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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.crypto.provider; | |
| 27 | + | |
| 28 | +import java.security.*; | |
| 29 | +import java.security.spec.*; | |
| 30 | + | |
| 31 | +import javax.crypto.*; | |
| 32 | +import javax.crypto.spec.RC2ParameterSpec; | |
| 33 | + | |
| 34 | +/** | |
| 35 | + * JCE CipherSpi for the RC2(tm) algorithm as described in RFC 2268. | |
| 36 | + * The real code is in CipherCore and RC2Crypt. | |
| 37 | + * | |
| 38 | + * @since 1.5 | |
| 39 | + * @author Andreas Sterbenz | |
| 40 | + */ | |
| 41 | +public final class RC2Cipher extends CipherSpi { | |
| 42 | + | |
| 43 | + // internal CipherCore & RC2Crypt objects which do the real work. | |
| 44 | + private final CipherCore core; | |
| 45 | + private final RC2Crypt embeddedCipher; | |
| 46 | + | |
| 47 | + public RC2Cipher() { | |
| 48 | + embeddedCipher = new RC2Crypt(); | |
| 49 | + core = new CipherCore(embeddedCipher, 8); | |
| 50 | + } | |
| 51 | + | |
| 52 | + protected void engineSetMode(String mode) | |
| 53 | + throws NoSuchAlgorithmException { | |
| 54 | + core.setMode(mode); | |
| 55 | + } | |
| 56 | + | |
| 57 | + protected void engineSetPadding(String paddingScheme) | |
| 58 | + throws NoSuchPaddingException { | |
| 59 | + core.setPadding(paddingScheme); | |
| 60 | + } | |
| 61 | + | |
| 62 | + protected int engineGetBlockSize() { | |
| 63 | + return 8; | |
| 64 | + } | |
| 65 | + | |
| 66 | + protected int engineGetOutputSize(int inputLen) { | |
| 67 | + return core.getOutputSize(inputLen); | |
| 68 | + } | |
| 69 | + | |
| 70 | + protected byte[] engineGetIV() { | |
| 71 | + return core.getIV(); | |
| 72 | + } | |
| 73 | + | |
| 74 | + protected AlgorithmParameters engineGetParameters() { | |
| 75 | + return core.getParameters("RC2"); | |
| 76 | + } | |
| 77 | + | |
| 78 | + protected void engineInit(int opmode, Key key, SecureRandom random) | |
| 79 | + throws InvalidKeyException { | |
| 80 | + embeddedCipher.initEffectiveKeyBits(0); | |
| 81 | + core.init(opmode, key, random); | |
| 82 | + } | |
| 83 | + | |
| 84 | + protected void engineInit(int opmode, Key key, | |
| 85 | + AlgorithmParameterSpec params, SecureRandom random) | |
| 86 | + throws InvalidKeyException, InvalidAlgorithmParameterException { | |
| 87 | + if (params != null && params instanceof RC2ParameterSpec) { | |
| 88 | + embeddedCipher.initEffectiveKeyBits | |
| 89 | + (((RC2ParameterSpec)params).getEffectiveKeyBits()); | |
| 90 | + } else { | |
| 91 | + embeddedCipher.initEffectiveKeyBits(0); | |
| 92 | + } | |
| 93 | + core.init(opmode, key, params, random); | |
| 94 | + } | |
| 95 | + | |
| 96 | + protected void engineInit(int opmode, Key key, | |
| 97 | + AlgorithmParameters params, SecureRandom random) | |
| 98 | + throws InvalidKeyException, InvalidAlgorithmParameterException { | |
| 99 | + if (params != null && params.getAlgorithm().equals("RC2")) { | |
| 100 | + try { | |
| 101 | + RC2ParameterSpec rc2Params = (RC2ParameterSpec) | |
| 102 | + params.getParameterSpec(RC2ParameterSpec.class); | |
| 103 | + engineInit(opmode, key, rc2Params, random); | |
| 104 | + } catch (InvalidParameterSpecException ipse) { | |
| 105 | + throw new InvalidAlgorithmParameterException | |
| 106 | + ("Wrong parameter type: RC2 expected"); | |
| 107 | + } | |
| 108 | + } else { | |
| 109 | + embeddedCipher.initEffectiveKeyBits(0); | |
| 110 | + core.init(opmode, key, params, random); | |
| 111 | + } | |
| 112 | + } | |
| 113 | + | |
| 114 | + protected byte[] engineUpdate(byte[] in, int inOfs, int inLen) { | |
| 115 | + return core.update(in, inOfs, inLen); | |
| 116 | + } | |
| 117 | + | |
| 118 | + protected int engineUpdate(byte[] in, int inOfs, int inLen, | |
| 119 | + byte[] out, int outOfs) throws ShortBufferException { | |
| 120 | + return core.update(in, inOfs, inLen, out, outOfs); | |
| 121 | + } | |
| 122 | + | |
| 123 | + protected byte[] engineDoFinal(byte[] in, int inOfs, int inLen) | |
| 124 | + throws IllegalBlockSizeException, BadPaddingException { | |
| 125 | + return core.doFinal(in, inOfs, inLen); | |
| 126 | + } | |
| 127 | + | |
| 128 | + protected int engineDoFinal(byte[] in, int inOfs, int inLen, | |
| 129 | + byte[] out, int outOfs) throws IllegalBlockSizeException, | |
| 130 | + ShortBufferException, BadPaddingException { | |
| 131 | + return core.doFinal(in, inOfs, inLen, out, outOfs); | |
| 132 | + } | |
| 133 | + | |
| 134 | + protected int engineGetKeySize(Key key) throws InvalidKeyException { | |
| 135 | + byte[] keyBytes = CipherCore.getKeyBytes(key); | |
| 136 | + RC2Crypt.checkKey(key.getAlgorithm(), keyBytes.length); | |
| 137 | + return keyBytes.length << 3; | |
| 138 | + } | |
| 139 | + | |
| 140 | + protected byte[] engineWrap(Key key) | |
| 141 | + throws IllegalBlockSizeException, InvalidKeyException { | |
| 142 | + return core.wrap(key); | |
| 143 | + } | |
| 144 | + | |
| 145 | + protected Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm, | |
| 146 | + int wrappedKeyType) throws InvalidKeyException, | |
| 147 | + NoSuchAlgorithmException { | |
| 148 | + return core.unwrap(wrappedKey, wrappedKeyAlgorithm, wrappedKeyType); | |
| 149 | + } | |
| 150 | + | |
| 151 | +} | |